JPH02253080A - Falling preventing tool for tube fitting - Google Patents

Abstract

PURPOSE:To achieve the certain prevention of falling of a spigot in a fitting falling preventing tool for preventing the falling of the spigot from a faucet by providing a constitution consisting of a support body having a space part, and locking bodies fitted to and held by the space part in such a manner as to be capable of sliding. CONSTITUTION:A fitting falling preventing tool 10 is installed in a faucet 20 to which a spigot 40 to connect is inserted, and engagingly locked on the circumferential surface of the spigot 40 inserted into the faucet 20 to prevent falling of the spigot 40 from the faucet 20 is formed of a support body 11 and locking bodies 12. The support body 11 has a C-shaped ring form, and is formed of metal and hard plastics and provided with divided ring space parts having opening parts on the circumferential part side. In the space parts of the support body 11, the locking bodies 12 which can be held by the circumferential surface of the spigot 40 are held in such a manner as to be capable of sliding. Consequently, the spigot can be certainly prevented from falling from the faucet without being broken.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is used for a pipe joint used for piping such as water pipes, and is installed in a socket and is inserted into the socket by locking on the outer circumferential surface of the socket. This invention relates to a stopper that prevents an insertion port from coming off from a socket.

(Prior art) Recently, as pipe joints used for water pipes, etc., the fittings of one pipe to be connected can be connected by simply inserting the fitting into the socket of the other pipe. Pipe fittings that can be used have been developed. Such pipe joints are usually used with an annular retainer installed in a receptacle into which the socket is inserted to prevent the socket from coming off. For example,
Publication No. 1-13087 discloses a ring capable of contracting and expanding the diameter, which is used as a retainer to be installed in a receptacle and which locks onto the circumferential surface of an inserted receptacle to prevent the receptacle from coming out. has been done. In the pipe joint disclosed in this publication, a tapered surface is provided on the inner circumferential surface of the socket, the diameter of which gradually decreases toward the opening of the socket into which the socket is inserted. The tongue disposed within the socket is divided by a notch provided at one location in the circumferential direction, so that the diameter can be reduced or expanded.

On the outer circumferential surface of the ring, two tapers are arranged in parallel in the axial direction so that the boundary portion thereof projects outward. Furthermore, inner circumferential retaining blades are provided on the inner circumferential surfaces of both ends of the ring, respectively.

In such a pipe joint, when the socket is inserted into the ring disposed inside the socket, the outer peripheral tapered surface on the inner back side of the ring comes into contact with the tapered surface of the inner layer of the socket, Both latching blades are not locked to the outer peripheral surface of the socket, and the socket is smoothly inserted into the ring. Then, when the insertion opening is moved in the direction of coming out of the socket while the insertion opening is inserted into the ring, the ring moves together with the insertion opening. As a result, the tapered surface of the outer peripheral surface of the ring on the side of the socket opening rotates around the boundary of the outer peripheral surface of the ring so as to come into contact with the inner peripheral surface of the socket, and A latching blade provided at the end engages with the outer circumferential surface of the receptacle, thereby preventing the receptacle from coming off from the receptacle.

(Problem to be Solved by the Invention) The ring used as a retainer in a pipe joint with such a configuration has a shape that is divided by a notch provided at one location in the circumferential direction, so that the diameter can be contracted and expanded. The inner diameter of the ring is slightly smaller than the outer diameter of the insertion opening that is inserted into the ring when the ring is not contracted or expanded. Therefore, a large amount of force is required when expanding the diameter of the ring in order to insert the push opening into the ring. Furthermore, when the diameter of the ring is reduced, the parts near the notches in the ring are strongly pulled toward each other, whereas in the opposite parts of the notches, the parts near the notches are pulled around the ring. No tensile force in the direction acts, and therefore the diameter reduction force does not act so much. Therefore, when a force is applied to reduce the diameter of the ring, the diameter can be easily reduced in the vicinity of the notch, but it is not easy to reduce the diameter in the part facing the notch. Therefore, when a diameter reducing force is applied to the ring, the part of the ring near the notch will firmly bite into the circumferential surface of the insertion opening inserted into the ring, but the part facing the notch The portion does not firmly bite into the circumferential surface of the socket, and the force of the ring to prevent the socket from coming off varies depending on the circumferential direction of the socket. As a result, the effect of preventing the insert from coming off from the socket may be significantly reduced.

The present invention solves the above-mentioned conventional problems, and its purpose is to easily fit the receptacle inserted into the receptacle,
Moreover, it is an object of the present invention to provide a retainer for a pipe joint that can prevent a strong locking force from acting only on a part of the circumferential direction of the insertion opening, and has a large effect of preventing the fitting from coming off from the insertion opening.

(Means for Solving the Problems) The pipe fitting retainer of the present invention is installed in a socket into which a socket to be connected is inserted, and is latched to the circumferential surface of the socket to be inserted into the socket. This retainer for pipe fittings prevents the insertion port from slipping out from the socket, and has an annular shape with a part of the circumference divided by a notch so that the diameter can be contracted and expanded. A support body having a space portion having an opening on the circumference side over the entire circumference, and a support body that is fitted into the space portion of the support body so as to be able to be locked to the circumferential surface of an insertion port inserted into a receptacle. a plurality of locking bodies, some of which protrude inward from the opening on the inner peripheral side, and which are slidably held on the support body at appropriate intervals from each other; This achieves the above objective.

(Example) The present invention will be described below with reference to Examples.

As shown in FIG. 1, the pipe fitting retainer of the present invention has the following features:
It includes a ring-shaped support 11 and, for example, four locking bodies 12 held on the support 11.

The support body 11 has a C-shaped ring shape in which a part of the circumferential direction is cut out at a notch 11a, and is made of a material such as metal, hard plastic, fluororesin, or tumbler to reduce the diameter and The diameter can be expanded. The cross-sectional shape of the support body 11 has a space inside, as shown in FIG.
The space is in the shape of a groove having an opening along the entire circumference on the inner circumferential side.

One side of the outer peripheral surface of the support body 11 in the axial direction is a peripheral surface portion 11b having a constant diameter in the axial direction,
The other side of the outer circumferential surface is a tapered portion 11C whose diameter gradually decreases as it moves away from the circumferential surface portion Nb.

The four locking bodies 12 disposed within the support body 11 are made of steel, for example, and the support body 11 is provided in a space within the support body 11.
are fitted and held so as to be slidable along the circumferential direction. Each locking body 12 has an arc shape slightly shorter than 1/4 circumference of the support 11, and one locking body 12
It is disposed so as to be located within the notch 11a of No. 1.

With this locking body 12 as a reference, three other locking bodies 12 are fitted and held within the support body 11 at appropriate intervals. The inner circumferential side portion of each locking body 12 protrudes inward from the inner circumferential side opening of the support body 11, and the inner circumferential surface thereof has a concavo-convex shape with a continuous sawtooth cross section along the axial direction. It has become. The diameter of the circular shape formed by the inner circumferential surface of each locking body 12 is slightly smaller than the outer diameter of a socket inserted into the support body 11, which will be described later, when the support body 11 is not contracted or expanded. The inner peripheral surface of each locking body 12 is locked to the outer peripheral surface of the insertion port.

The retainer lO of the present invention having such a configuration is shown in Fig. 3 (
As shown in a), the socket 40 to be connected is inserted into the cylindrical socket 20 for use.

The receptacle 20 has an opening 21 at one end into which the insertion port 40 is inserted, and an annular sealing member groove 22 is disposed around the entire circumference on the inner peripheral surface near the opening 21. .

A seal member 30 made of, for example, rubber is fitted in the seal member groove 22 in a liquid-tight manner, and the receptacle 20
When the insertion opening 40 is inserted inside, the sealing member 30 is fitted onto the insertion opening 40 and is brought into close contact with the outer peripheral surface of the insertion opening 40 in a fluid-tight manner.

A recess 23 for a retainer is provided on the inner circumferential surface of the socket 20 on the inner side of the groove 22 for a seal member, and a retainer of the present invention is inserted into the recess 23 for a retainer. 10 are fitted and installed. Recessed portion 23 for the retainer
is a tapered surface 2 in which the inner circumferential surface of the side portion of the socket 20 on the opening 21 side is gradually reduced in diameter as it approaches the opening 21 side.
It is 3a. The angle of inclination of the tapered surface 23a with respect to the axis is smaller than the angle of inclination of the tapered portion 11c of the outer peripheral surface of the support body 11 in the retainer 10 with respect to the axis. The inner circumferential surface of the side portion on the inner back side connected to the tapered surface 23 a is a circumferential surface 23 b that is substantially parallel to the axis of the socket 20 .

The inner diameter of the circumferential surface 23b is slightly larger than the outer diameter of the circumferential surface 11b when the support 11 in the stopper 10 is not contracted or expanded in diameter. The inner side surface 23c of the retainer recess 23 connected to the circumferential surface 23b is slightly inclined with respect to the plane perpendicular to the axis so that the axis side is located on the inner side of the socket 20. are doing.

In the pipe joint having such a configuration, when inserting the insertion port 40, it is necessary to insert the
For example, a sealing member 30 made of rubber is fitted, and the retainer 10 is installed in the retainer recess 23 such that the circumferential surface 11c of the support 11 is located on the innermost side.

In the retainer 10, the locking bodies 12 held on the support 11 are arranged at appropriate intervals without touching each other when the diameter of the support 11 is not reduced. Therefore, the end surfaces of the support 11 facing each other with the notch 11a interposed therebetween can be brought closer to each other to bring the entire support 11 into a reduced diameter state. Therefore, the retainer 10 can be easily fitted into the retainer recess 23 by inserting the retainer 10 through the opening 21 of the socket 20 with the diameter of the support 11 reduced. At this time, for example, the locking weight 2, which is partially located inside the notch 11a of the support 11, is
The diameter of the support body 11 is reduced and the support body 11 is installed in the retainer recess 23. After the installation, the support body 11 is
The disengaged locking body 12 may be fitted into one predetermined position. In this case, the force for reducing the diameter of the support body 11 is further reduced.

In this state, when the end of the insertion port 40 is inserted through the opening 21 of the socket 20, the end of the insertion port 40 will fit into the seal member 30 and then enter the retainer 10. try to. At this time, the inner diameter of the retainer 10 is
Because it is slightly smaller than the outer diameter of the insertion port 40,
The distal end surface of the insertion port 40 moves the retainer 10 inside the retainer recess 23 to the inner back side of the receiving opening 20 , and the retainer 10 is inserted into the retainer 9 = inside the retainer recess 23 . It is pressed against the rear side surface 23c. The outer peripheral surface of the tip of the insertion port 40 has a tapered shape that gradually decreases in diameter as it approaches the tip, and the tapered portion of the outer circumference of the tip of the insertion port 40 prevents the insertion port 4o from coming off. While expanding the diameter of the tool 10, it enters into the stopper lo. At this time, each locking body 12 in the retainer 10 is attached to the support body 1
Since each locking weight 2 is slidably fitted into the space within the support body 11 in a state where it is divided into approximately 1/4 circumference, each locking weight 2 is easily expanded in diameter by the insertion port 40, The insertion port 40 is easily inserted into each locking body 12 in the retainer 1o.

Peripheral surface portion 1 on the outer peripheral surface of support body 11 of retainer 10
1b has a slight gap from the circumferential surface 23b of the retainer recess 23 when the insertion port 40 is inserted into the retainer 10.

In this way, the end of the push-in port 4o is pushed into the receiving port 20 to a predetermined length, and clean water or the like is allowed to flow therethrough. As a result, the insertion port 4o moves in the direction in which it comes out of the socket 20. As the insertion port 4o moves, the insertion port 4o
A retaining tool 1o externally fitted on the insertion port 40 moves integrally with the insertion port 40. At this time, the inclination angle of the tapered surface 23a of the retainer recess 23 with respect to the axis of the retainer 10
Since the angle of inclination of the tapered portion 11c of the support body 11 with respect to the axis is smaller than that of the tapered portion 11c of the support body 11, the retainer 1
The boundary between the tapered part 11c of the outer circumferential surface of the support body 11 of No. 0 and the circumferential surface part 11b abuts the tapered surface 23a of the retainer recess 23, and the internal pressure of the pipe increases,
When the insertion port 40 moves in the direction of coming out from the socket 20,
The retainer lO rotates around the boundary in the direction indicated by arrow A in FIG. 3(b). At the same time, the retainer 1o
A diameter-reducing force acts on the support 11, causing the support 11 to contract in diameter, and each locking body 1 fitted and held within the support 11
2 are brought close to each other, and the diameter of the circle formed by each locking body 12 is reduced. At this time, since a strong tensile force acts on each end of each locking body 12, the diameter reducing force at each end becomes large, and each end of each locking body 12 Each locking body 12 bites into the outer circumferential surface of the insertion port 40 and is firmly locked to the insertion port 40.

When water pressure is further applied to the insertion port 40 and the insertion port 40 tries to come out from the socket 20, the entire surface of the taper part lie on the opening 21 side on the outer circumferential surface of the support 11 of the retainer 10 becomes the recess for the retainer. 23, the retainer 10 contacts the taper 23a in the retainer recess 2.
Although the diameter is reduced due to the diameter reduction force from the tapered surface of No. 3, the retainer 10 is not rotated, and excessive locking of the outer peripheral surface of the insertion port 40 by each locking body 12 is suppressed. Support 11
By appropriately setting the circumferential length of the cutout portion 11a, excessive locking of each locking body 12 to the circumferential surface of the insertion port 40 can be suppressed.

Each locking body 12 does not need to have an uneven inner circumferential surface with a serrated cross section as in the above embodiment, but for example, as shown in FIG. A configuration may be adopted in which a plurality of locking portions each having a sharp tip protruding inwardly are provided. Further, if the support body 11 is configured so that the opening in the inner circumferential portion becomes narrower as it goes inward (the second
(see dotted chain line), each locking body 12 is reliably supported in the space within the support body 11.

(Effects of the Invention) As described above, the pipe fitting retainer of the present invention has an annular support body that is partially divided in the circumferential direction by notches. Since a plurality of protruding locking bodies are slidably supported at appropriate intervals, each locking body can be easily enlarged in diameter integrally with the support body, making it easy to insert an opening into each locking body. can be inserted into. In addition, due to the diameter reduction of the support, each end of each locking body is firmly locked, so that the locking force of each locking body on the circumferential surface of the insertion port is reduced in the circumferential direction of the insertion port. There is no risk that the locking force will be concentrated on a portion of the socket, and therefore, the socket will be reliably prevented from coming off from the socket without being damaged.

[Brief explanation of drawings]

FIG. 1 is a front view of the pipe joint retainer of the present invention, FIG. 2 is a sectional view thereof, and FIGS. 3(a) and (b) each show an example of a pipe joint using the retainer. It is a partially cutaway sectional view, and FIG. 3(a) shows the state in the middle of insertion of the insertion port,
FIG. 3(b) is a state in which the insertion port is completely inserted, and FIG. 4 is a sectional view of another embodiment of the retainer. 10... Retainer, 11... Support, lla.
...notch part, 11b...peripheral surface part, lie...tapered part, 12...locking body, 20...receptacle, 2
1...Opening part, 23...Recessed part for retainer, 2
3a... Tapered surface, 40... Insertion port. that's all

Claims (1)

[Claims] 1. A tube that is installed in a receptacle into which a socket to be connected is inserted, and that locks onto the circumferential surface of the socket inserted into the socket to prevent the socket from coming out from the socket. This is a retainer for joints, which has an annular shape with a part of the circumference divided by a notch so that the diameter can be contracted and expanded, and the space with an opening on the inner circumferential side is completely closed. A support body that extends around the circumference, and a portion that extends inward from an opening on the inner circumference side so that it can be fitted into the space of the support body and locked to the circumferential surface of a socket that is inserted into the receptacle. A retainer for a pipe joint, comprising: a plurality of locking bodies protruding from the support body and slidably held on the support body at appropriate intervals from each other.